Portion of a shoe upper

FIG. 1 is a front perspective view of a portion of a shoe upper showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a second side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a top view thereof.

The uneven broken line in FIGS. 2-6 bounding the top center region of the design represents an unclaimed boundary of the design. The uneven broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design.